摘要
在两方程的剪切应力输运SST k-w全湍流模型中添加γ-Re_θ转捩模型,以某两叶片垂直轴风力机为研究对象,数值计算得到叶片表面压力的分布规律,并与文献中的实验结果进行了对比.在此基础上,分析和对比了添加转捩模型后,风轮的转矩和推力系数、叶片表面极限流线分布和叶片表面摩擦阻力系数的变化规律.结果表明：相比SST k-w全湍流模型,添加γ-Re_θ转捩模型后的四方程Transition SST转捩模型预测得到的风轮的转矩系数和推力系数的均方根分别下降了6.13%和0.55%;计算时考虑γ-Re_θ转捩模型能够预测垂直轴风力机叶片表面边界层的转捩现象和更详细地捕捉叶片表面复杂的流动特征.
The γ-Re_θ transition model was added to two-equation SST（shear stress transport） k-w turbulence model,and a two-blade VAWT（vertical axis wind turbine） was studied by numerical method. The pressure distribution of blade surface was obtained and compared with the experimental results in the literature.On this basis,the torque and thrust coefficient of rotor,the limiting streamline distribution of blade surface and the skin friction coefficient of blade surface were analyzed and compared.The results show that,compared with the SST k-w turbulence model,the root mean square of the rotor torque coefficient and thrust coefficient predicted by four-equation transition model are decreased 6.13% and 0.55%.In the calculation,the four-equation transition model can predict the transition phenomenon of the boundary layer of the VAWT blade and capture the complex flow characteristics of the blade surface in more detail.
作者
张旭耀
杨从新
李寿图
Zhang Xuyaoa Yang Congxinab Li Shoutua,b(a School of Energy and Power Engineering; b Key Laboratory of Fluid Machinery and Systems, Gansu Province, Lanzhou University of Technology, Lanzhou730050, Chin)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第2期17-22,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
甘肃省青年科技基金资助项目(1508RJYA098)
关键词
转捩模型
垂直轴风力机
气动性能
湍流模型
流动特征
transition model
VAWT （vertical axis wind turbine）
aerodynamic characteristic
turbulence model
flow characteristic
